Creating a flag for the last two months

[lucasx15]

Hello everybody, I'm new to qlikview,
I need to create a flag field for customers who have used the same product in the last two months.

in my load, I created a temporary table and thought of using the peek function, for her to check and create the flag for me. However, it's not working:

TEMP__1:
LOAD NR_CLIENT,
	 DT_INT_DISP,
	 DT_FINISH_DISP,
	 RowNo()
RESIDENT CLIENT_PRODUCT_DISP
WHERE NR_SEQ_PRODUCT=1
ORDER BY NR_CLIENT,
		 DT_INT_DISP ASC;


TEMP_2:
LOAD NR_CLIENT,
	 DT_INT_DISP,
	 DT_FINISH_DISP,
	 IF(NR_CLIENT=PEEK(NR_CLIENT),
		IF(DT_INT_DISP-PEEK(DT_FINISH_DISP),-2)'YES','NO'),'NO') AS FL_CLIENT_2,
		ROWNO(),
		Resident TMP_1
Order by NR_CLIENT, 
		 DT_INT_DISP ASC;